Sewing-machine attachment.



M. F. BOCKELMAN.

SEWING MACHINE ATTACHMENT.

APPLICATION FILED APR. 18, I914.

Patented Au 17, 1915.

Hull 1 ammwtm MFBDCKELMAN MARTIN F. BOCKELMAN, OZFNASHVILLE, KANSAS.

SEWING-MKGHTNE ATTACHMENT.

Specification of Letters Patent.

Patented Aug. 17, 191 5.

.Applicationfiled April 18, 1914. :Se1'&a11\'[.o.:832;88 4.

To-aZl whom it ma/yconccm Be it known that I, MARTIN F. BocKnL- MAN, a citizen of the United States, residlng at Nashville, in the county of Kingman and State of Kansas, have invented certain new and useful Improvements in Sewing-Machine Attachments, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to new and useful improvements in sewing machine attachments and is particularly directed to the provision of means for preventing the drive wheel of the machine from stopping in a position commonly known as'on dead center.

One of the objects of the present invention resides in the provision of means which may be readily attached to. a machine in a manner which interferes to no extent with the operation thereof and which will effectually prevent the drive wheel of the ma chine from stopping in a position wherein the axis of rotation of the wheel meets the extended axis of the pitman, in a position commonly known as dead center.

It is a further object to provide a device which is of extremely simple design so that its ready attachment is furthered and so that it may be manufactured at an extremely low cost.

With these and other objects and advantages in view, the invention resides more particularly in the novel combination, formation and arrangement of parts more fully hereinafter described and particularly pointed out in the claim hereto appended.

Reference is had to the accompanying drawings, wherein similar characters of reference designate corresponding parts throughout the several views, and in which- Figure 1 is a vertical sectional view taken through a sewing machine and showing the improved attachment connected therewith. Fig. 2 is a detail view showing the manner of connecting the upper end of the spring rod to the pitman; and Fig. 3 is a detail view showing the manner of connecting the lower end of the pitman to the treadle, and showing the spring rod extending through the ears on the treadle.

Referring more particularly to the drawing, 5 designates one of the end supporting frames upon the upper ends of which a sewing machine table 6 is mounted, and the frames 5 are connected at their lower ends connected at its upper end by a centrally disposed :shaft 17' :upon one end of which is pivotally mounted a treadle plate 8. Connected to the upper face of the treadle plate adjacent its rear edge are a pair of upstanding spaced apertured lugs 9 to which the ends of a shaft 10 are connected above the treadle 8, the lower end of a pitman 11 being pivotally connected to the shaft, and the upper end of the pitman being extended laterally for pivotal engagement with a drive wheel 12 which is rotatably supported upon one end of the frame 5. Suitably supported upon a shaft 13 above the table in vertical alinement with the drive wheel 12, is a driven wheel 14, the wheels 12 and 14 being connected by the usual endless belt 15, the opposite stretches of which extend through openings 16 formed in the table.

The means for preventing the stopping of the machine at a dead center, comprises a spring rod17 which i directed laterally as at 18 atits lower end, the portion 18 of the rod being passed between the ears 9 on the treadle plate below the shaft 10, and the extremity of the portion 18 of the rod being secured to the treadle plate by bolts 19 forwardly of the ears 9. The body portion of the spring 17 extends upwardly and rearwardly of the pitman 11, the upper end of the spring being extended forwardly as at 20 to engage one side of the pitman. Arranged upon the opposite side of the pitman 11 and in parallel relation with the portion 20 of the spring rod, is a clamping plate 21, which is secured at its opposite ends to the portion 20 of the spring rod by the bolts 22, whereby the rod is rigidly to the pitman, to move upwardly and downwardly with the same. l/Vith my improved device in use, should the machine tend to stop at a dead center, the tension of the spring rod 17 against the pitman will always cause the same to be moved passed the dead center before the mechanism i allowed to stop.

Having thus fully described the invention, what I claim and desire to secure by Letters Patent is:

In a treadle attachment for sewing machines for overcoming dead centers, the combination with a treadle having a pair of spaced upstanding lugs, and a pitman rod pivotally connected at one end to the treadle between the lugs, of a resilient rod having it lower end angularly bent and extending between said lugs below the lower end cf engaged with the upper portion of the pitthe pitman rod, said angularly bent end man rod. .r 10 being secured at its extremity to said treadle In testimony whereof'I hereunto afiix my at a point inward of the pivotal attachment signature in the presence of two Witnesses.

of the pitman t0 the treadle, the body por- MARTIN F. BOCKELMAN.

tion of the rod being vdisposed in the same Witnesses: 1 V 'vertical plane as the pitman rod and having ERNEST E. KEUEHN,

its upper end angularly bent and adjustably GEO. H. BOCKELMAN.

*Oopies of this patent may be obtained for five cents each, by addressing the Gommissiener of Patents I Washington, D. C. s 

